Adjustable carrier for sewing machines



I. F. WEBB.

ADJUSTABLE CARRIER FOR SEWING MACHINES.

APPLICATION FILED MAR. I0. I9I9.

Patented Aug. II, 1922.

2 SHEETSSHEET I.

INVENTOR 1571122572? Z0655.

ATTORNEY I. F. WEBB.

ADJUSTABLE CARRIER FOR SEWING MACHINES.

APPLICATION FILED MAR. 10. 1919.

1,424,698. Patented Aug. 1, 1922.

2 SHEETSSHEET 2.

INVENTOR living 17 206% b.

6. #W BY W 1 ATTORNEY WITNESSES:

par

1' L F.- WEBB, OF ELF 1TH, JERSEY, ASSIGNOR TO THE SINGER MANUFAC-.'.I.UG COMYANY, A CORPORATION OF NEW JERSEY.

ADJUSTABLE CARRIER FOR SEWING MACHINES.

Specification of Letters Patent.

Patented Aug. 1, 1922.

Application filed March 10, 1919, Serial No. 281,812.

To all whom it may concern:

Be it known that I, IRVING F. WEBB, a citizen of the United States,residing at Elizabeth, in the county of Union and State of New Jersey,have invented certain new and useful Improvements in Adjustable Carriersfor Sewing Machines, of which the following is a specification,reference being had therein to the accompanying drawings.

I This invention relates to improvements in the mounting, control andconvenient manipulation of sewing machines to better meet therequirements of seam-formation in materials presented to thestitch-forming mechanism by devices actuated and controlled independentof the operating mechanism of the sewing machine, as in machines forclosing the mouths of filled sacks. The primary object of the presentinvention is to adjustably secure the sewing machine against accidentaladjustment when in its operative position, but unsecured againstadjustment to an idle position out of its operative field. The inventionfurther consists in the various matters, all as hereinafter describedand referred to in the appended claims.

Referring to the drawings, which form a part of the specification Fig. 1is a view in perspective of a sewing machine secured on a table topmounted on a suitable frame (the latter only partly illustrated) institchforming position, together with the present improved means forefiecting opposiely directed vertically arranged adjustments of saidmachine. Fig. 2 is a view in perspective similar to Fig. 1 with thesewing machine adjusted to its idle position. Fig. 3 is a view, mainlyin section, of the means employed for effecting adjustments of thesewing machine when occupying its operative position. Fig. 4 is a viewin perspective of a portion of the frame base illustrating the manuallyoperated treadle for controlling the action and inaction of thestitch-forming mechanism.

Referring to the drawings 1 represents a sewing machine of which thestitch-forming and cloth-feed actuating mechanism is substantially asdisclosed in the patent to W. H. Hugg, No. 1,005,840, October 17, 1911.No detailed disclosure of this mechanism is herein made, as theinvention is applicable to any form of sewing mechanism includingwork-holding devices between which the work is held as it is fed pastthe point of seam-formation. The sewing machine is suitably secured to aplate 2 carried by a hinged-bracket 3. pivoted at 4 to a hingebracket 5suitably secured to a table top 6 of the frame 6, and on saidhinged-bracket is suitably secured an electric motor 7, operativelyconnected by a belt 8 with loose and tight pulleys 9 and 10 of thesewing machine, the arrangement of the motor and said pulleys withrespect to the pivot 4 being such that under all conditions ofadjustment of said machine about the latter the same drivingrelationship is maintained.

11 represents a screw-threaded rod pivoted at 12 to a bracket 13suitably secured tv the table top and 14 a nut threaded on said rod andprovided with a cone-shaped surrace 15. 16 denotes a tubularnut-actuating element suspended by screws, as 17, from the bevel gear 18and provided with an inner coneshaped surface 18' normally in engagementwith the cone-shaped surface of the nut 14. 19 denotes a collarsurrounding the element 16 into which pintle screws 20 and 21 are seatedafter having been threaded into openings 22 and 23 respectively in therespective brackets 24 and 25 formed integral with the hinged bracket 3,and between the collar 19 and the surface 26 of the element 16 hearingballs 27 areintroduced to better provide for the rotation of saidelement with respect to the stationary collar 19. 28 denotes ahand-wheel mounted to turn on the binder screw 21 and provided with aknob 29 and hub 30, the latter, through the screws as 31, carrying thebevel gear 32 meshing with the gear 18 the rotation of which through thecontacting cone-surfaces 15 and 18', causes the nut 14 to track thethreaded rod 11, when for any purpose, it is desired to raise or lowerthe sewing machine head within its field of stitch-formation.

From the foregoing it will be understood that the sewing head may begiven oppositely directed vertically arranged adjustments on thethreaded rod 11 by the manual manipulation of the hand-wheel 28 and thatwhen it is desired to adjust said head to its position of rest out ofits position of seamformation, as illustrated in Fig. 2, for the purposeof cleaning, oiling, adjusting etc., such adjustments are in no waycontrolled by said hand-wheel.

33 represents a belt-shifting lever pivoted at 34 to a bracket 35suitably secured to the plate 2 and provided with belt-shifting pins as36, brake-element 37 and an adjusta'bly secured belt shifting weight 38,the opposite end of said lever being provided with an extension 39 'towhich is suitably secured a flexible belt shifting connection 40 passingover an idler 41 provided with a guard 42, said connection passingthrough a suitable opening (not shown) in the table top and at its lowerend suitably attached to an arm 43 of a bell-crank-lever 44 whose secondarm j 45 is acted on by an oscillated treadle 46 pivoted on a stud 47secured in the frame base 48, said treadle being limited in itsmovements'to shift the belt 8 by a stationary pin 49.

As will be readily understood the operator operates the treadle in thedirection indicated by the arrow S by moving the foot against theup-turned portion 50 in opposition to the gravity action of the weight38 to shift the belt 8 from the loose to the tight pulley, the action ofthe weight returning said belt to its normal position when the foot ismoved out of engagement with the treadle.

While the present improved means is designed more particularly for usein connection with constructions of the character em-- p'loyed forclosing the mouths of filled sacks, such for instance, as is representedby U. S. Patent No. 1,274,742, August 6, 1918 toG. E. Molyneux, it isnot deemed necessary 'to illustrate or describe such construction as ithas no bearing on the present improved means except to illustrate asingle application of the present invention.

Having thus set forth the nature of-the invention, what I claim hereinis- 1 1.. In a device of the character described,

the combination with asewing machine, of a hinged-bracket supportingsaid sewin machine, an electric motor carried by sai bracket, andconnections between said motor and said machine for transmitting powerto the latter.

2. In a deviceof the character described, the combination with a sewingmachine, of a hinged-bracket supporting said sewing machine, means forefi'ectin adjustments of said machine about the axls of saidhingedbracket, an electric motor carried by said hinged-bracket, andconnections bet-ween sai motor and'said machine for transmitting powerto' the latter.

3. In a device of the character described, the combination with a sewingmachine, of a hinged-bracket supporting sa1d sewing machine, means formaintaining given adjustments of said bracket about its axis, anelectric motor carried by said bracket, and con nections between saidmotor and said machine for transmitting power to the latter.

4. In a device of the character described, the combination with a sewingmechanism i cludin work-holding devices for h ldi g the worktherebetween, of adjusting means for altering the sewing position ofsaid sewing mechanism, including coacting devices freely separableindependently of said adjusting means to at will permit movement of saidsewing mechanism to inoperative position.

5. Ina device of the character described, the combination with a sewingmechanism includin work-holding devices for holding the worktherebetween, of coacting devices normally self-maintained in operativerelationship whereby the sewing position of said sewing mechanism may bealtered at will, but freely permitting separation without adjustmentthereof to at will move said sewin mechanism to inoperative position.

6. 1%1 a device of the character described, the combination with asewing mechanism including work-holding devices for holding the worktherebetween, and a hinged-bracket supporting said sewing mechanism, ofcoacting devices of which one is sustained by said inged bracket and isnormally maintained in operative relationship with its 00- acting devlcewhereby the sewin position of said sewing mechanism ma e altered atwill, said coacting devices bein freely separable independently of anyad ustment thereof to at will permit movement of said sewing mechanismto inoperative position.

7. In adevice of the character described, the combination with a sewingmechanism, of a threaded rod, a pivotal sup-port for said rod, a nutthreaded on said rod, and a device coacting with said nut for alteringthe sewing position of said sewing mechanism,

but freely separable from said nut without adjustment to permit movementof said sewirig mechanism to inoperative position.

8. n a device of the character described, the combination with a sewingmachine, of a hinge-bracket to which the latter issecured meansincluding a threaded rod provided with a nut, together with-meanscarried b said bracket for actuating said nut through fridtionalengagement with said liatter means, said rod, nut and. said meanscarried by said bracket cooperating to effect adjustments of and securesaid machine against accidental adjustment when in its position ofseam-formation but separable to permit of its adjustment to an idleposition out of its field of seam-formation independent of'said rod, nutand said means carried by said bracket-arm.

9. In a device of the character described,

the combination with a sewing machine, of aoperating driving member foreffecting adjustments of and to secure said machine against accidentaladjus ment when in its position of seam-formation, but permitting of itsadjustment to an idle position out of its field of seam-formationindependent of the nut and said cooperating member.

10. In a device of the character described, the combination with asewing machine, of a hinged-bracket to which the latter is secured, anelectric motor carried by said bracket and connections between saidmotor and said machine for transmitting power to the latter, abelt-shifting lever controlled, through a flexible connection andsuitable treadle, to effect and to arrest said power transmission, saidflexible connection tracking an idler the axis of which is located withrespect to the axis of said bracket to maintain a like control of saidlever under all conditions of adjustment of said machine within itsfield of seam-formation.

11. In a device of the character described, the combination with asewing machine, of a hinged-bracket to which the latter is secured, anelectric motor carried by said bracket and connections between saidmotor and said machine for transmitting power to the latter, a beltshifting lever controlled, through a flexible connection and suitabletreadle, to

eflect and to arrest said power-transmission, said flexible connectiontracking an idler the axis of which is located, with respect to the axisof said bracket, to maintain a like control of said lever under allconditions of adjustment of said machine within its field ofseam-formation, said idler, being provided with a guard for retainingsaid connection in engaging relationship with the idler when saidmachine is being adjusted in opposite directions outside its operativefield.

12. In a device of the character described, the combination with asewing machine, of a hinged-bracket to which the latter is secured. saidbracket having an opening -into which is pivotally mounted a collar, atubular nutactuating element surrounded by said collar. a threaded rodand a nut adapted to track the threaded rod and frictionally engaged bysaid element, said collar acting on said actuating element to, throughsuitable power transmitting elements, cause said nut to track said rod.

In testimony whereof, I have signed my name to this specification.

IRVING F. WEBB.

